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ffmpeg -i file.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" out.mp4

Source: https://stackoverflow.com/questions/31781238/using-ffmpeg-to-convert-gif-to-mp4-output-doesnt-play-on-android

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# Draw a horizontal line of 5cm length centered in the page

\begin{center}
\line(1,0){5cm}
\end{center}

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# Parallelized XZ compressor

## Install requirement

sudo apt install pixz -y


## Create XZed archive

tar -Ipixz -cvf myArchive.tpxz archive/

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# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

auto enp0s8

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Openssl 1.1.x on GNU/Debian 12
==============================

The following shows how to install openssl branch 1.1.x alongside debian default libssl3.

Some applications require to have:
- libssl.so.1.1
- libcrypto.so.1.1

Using the following allows one to not tamper with the system's default/setup,

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Target system: Debian 12
========================

main ref: https://www.build-python-from-source.com


# install system dependencies

sudo apt update && sudo apt upgrade -y && sudo apt install git make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev curl xz-utils liblzma-dev wget

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#deb cdrom:[Ubuntu 21.10 _Impish Indri_ - Release amd64 (20211012)]/ impish main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://old-releases.ubuntu.com/ubuntu/ impish main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu/ impish main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://old-releases.ubuntu.com/ubuntu/ impish-updates main restricted

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### python2

mkdir -p venv/py2-00/

sudo apt-get install virtualenv -y

virtualenv -p python2 venv/py2-00/


### python3

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#!/bin/bash

echo :::::::::::::
echo Getting PEDA
echo :::::::::::::

sudo apt-get update && sudo apt-get install git gdb build-essential gcc-multilib vim -y

git clone https://github.com/longld/peda.git ~/peda
echo "source ~/peda/peda.py" >> ~/.gdbinit

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# installation notes of UROBOROS poc on a debian-10.7.0-amd64

# ref.:
https://www.usenix.org/system/files/conference/usenixsecurity15/sec15-paper-wang-shuai.pdf
https://ieeexplore.ieee.org/document/7476646

sha256:
b317d87b0a3d5b568f48a92dcabfc4bc51fe58d9f67ca13b013f1b8329d1306d  debian-10.7.0-amd64-netinst.iso

# proceed installation with only the standard utilies and ssh server